Milling-machine cutter.



No. 700,736. Patentad May 27, I902.

J. F. CADELL. f

MILLING-MACHINE CUT I'ER.

(Application filed May 15. 1901.) (No Modei.) 2 ,Sheets-Sheet I.

No. 700,736. Patn'ted May 27, 190 2.

' J. r. CADELL.

MILLING MACHINE CUTTER.

Appfication filed May 15, 1901.)

, (No Model.) 2$heetsSheet 2.

THE mums mans cu, Pnmaurjipl'. wan-imam", n. c.

UNITED STATES PATENT OFFICE.

JOHN F. OADELL, OF BALTIMORE, MARYLAND, ASSIGNOR TO OTT. MERGENTHALERCOMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF DELAWARE. J

SPECIFICATION forming part of Letters Patent No. 700,736, dated May 27,1902.

Application filed May 15,1901. Serial No. 60,277. (No model.)

To all whom it may concern:

Be it known that I, JOHN F. OADELL, a citizen of the United States,residing at the city of Baltimore, in the State of Maryland, haveinvented certain newand useful Improvements in Milling-Machine Cutters,of which the following is a specification.

This invention relates to improvements in milling-cutters by which thecutting-blades may be adjusted for making cuts of various widths and maybe locked securely in any adjustment.

In the accompanying drawings, Figure 1 is a central longitudinal sectionthrough a milling cutter embodying my improvements.

Fig. 2 is an end View of' the same, partlybroken away. Fig. 3 is a sideView of a portion of the cutter, the cutter-blades thereon beingparallel with one another. detail View showing the arrangement of anadjusting-screw and cutter-blade. Fig. 5 is a side view of a cutter,showing the cutterblades arranged in angular relation to one another.Fig. 6 is a similar View showing the cutter-blades arranged parallelwith one another, but inclined withreterenceto the body. Fig. 7 is aperspective View of one of the cutter-blades.

Referring to Figs. 1, 2, 3, 4, and 7 of the drawings, 1 indicates thecylindrical body of the cutter, which may be hollow, as shown, or solidand which is provided with a series of channels 2, extendinglongitudinally along its outer surface. Within these channels arearranged the cutting-bladesfi, each having a base 3", which extendsforwardly of the cutting edge 3, and the upper edge of said forwardprojection is'beveled, as shown at 4. These blades are normally lockedwithin the channels by means of locking-screws 5, having taperedportions 6, which bear against the beveled facesof the blades, andcylindrical portions 7, bearing against faces 8 in the body-piece, whichare parallel with the axes of the screws. This arrangement of thelocking-screws is substantially the same as that shown in my Patent No.598,904, granted February 15, 1898. In that patent, however,

which was for a reamer, the blades were not Fig. 4 is a longitudinallyadjustable and were provided with tapering recesses upon their innerfaces adapted to receive the tapering portions of thelocking-screws,whereas in the present invention the blades are providedwith plain beveled faces 4, so that the screws may engage and lockthe-blades in any longitudinal adjustment. The blades of the cutter areall of the samelength, and each blade is provided with a transversegroove 9 in its rear side near one end. Adjacent to and in the rear ofeach cutter is an adjusting-screw 10, fitting within a threaded opening11 in the end of the bodypiece parallel with the blade. This screwisprovided with a head or flange 12, which engages the groove in the endof the blade, so that the turning of the screw adjusts the bladelongitudinally of the bodypiece when the former is not locked inposition bythe locking-screws. As shown, the adj usting-screws for theseries of blades are arranged alternately at opposite ends of thebody-piece, and" the consecutive blades are grooved transverselyatalternately opposite ends. By this arrangement it will be seen thattheblades are independently adjustable longitudinally of the body-piece andthat the alternate blades may be movedin opposite directions to increaseor decrease the width of the cut. In adjusting the blades thelocking-screws are of course first loosened, and the adj usting-screwsat one or both ends of the body are turned to move the blades into thedesired position. The locking-screws are then tightened, their taperingfaces fitting against the beveled faces of the blades and clamping thelatter. The openings for the adjusting-screws arepreferably-counterbored, as shown at 11, Fig. 4, in order that the heads12 may enter the recesses thus formed and draw the ends of the blades inflush with the ends of the body.

While for smooth working it is desirable that the consecutive bladesshould be'adj ustable in alternately opposite directions, it will beunderstood that the cutter would be operative if the blades werearranged insimilarly adjustable groups of two or three or the alternateblades or groups only need be adj ust= ed, the remaining blades beingpermanently locked in position. The arrangement of the adjusting-screwsin the rear of the cutterblades is a feature of some importance, as inthis position they are out of the Way and not apt to be clogged withmetal cuttings. By these improvements a very simple means of varying theeffective length of the cutter is provided.

The cutter-blades may be arranged upon the body in various ways. InFigs. and 6, for instance, the grooves 2 and the blades 3 are inclinedwith reference to the body. In

the former figure the consecutive grooves and blades are inclined inalternately opposite directions, while in Fig. 6 they are inclined inthe same direction.

It will be understood that for the purpose of increasing the diameter ofthe cutter or providing for wear the blades may be underlaid withsuitable metal strips arranged within the channels.

Having thus described my invention, what -I claim, and desire to secureby Letters Patadjustable cutting-blades within said chan-- nels andhaving their cutting edges extending I outwardly beyond the periphery ofthe bodypiece, each blade having a base projecting forwardly from theblade, said base having a plain beveled surface on its forward side, andlocking-screws extending into the body and having tapering portionsadapted to engage the beveled surfaces of the blades.

3. In a milling-cutter, the combination of a body-piece having a seriesof longitudinal channels on its outer surface, longitudinallyadjustablecutting-blades in said channels, and adjusting-screws extendinglongitudinally into the body-piece adjacent to the blades, said screwsand blades being connected to mutually engage, whereby the blades may beadjusted in either direction by turning the screws.

4. In a milling-cutter, the combination of a body-piece having a seriesof longitudinal channels on its outer surface, longitudinallyadjustablecutting-blades in said channels,

each blade havinga transverse groove on its rear side near one end, andadj usting-screws extending longitudinally into the body in the rear ofthe blades, each screw having a flange engaging the slot in an adjacentblade.

' 5. In a milling-cutter, the combination of a body-piece havinga seriesof channels on its outer surface, cutting-blades in said channels, eachhaving a plain beveled surface on one side and a transverse groove nearone end, adjusting screws extending longitudinally into the oppositeends of the-body adjacent to the blades, each adjusting-screw having ahead engaging the groove in the adjacent blade, and locking-screwshaving tapering heads adapted to engage the beveled surfaces of theblades.

6. In a milling-cutter, the combination of a body-piece having a seriesof longitudinal channels on its outer surface, adjustable cutting-bladeswithin said channels, each blade having a plain beveled surface on oneside and a transverse groove near one end, adjustingscrews extendinglongitudinally into the body adjacent to the blades, eachadjusting-screw having a flange engaging the groove in the adjacentblade, and locking-screws having tapered headsadapted to engage thebeveled surface of the blades.

7-. In a milling-cutter, the combination of a body-piece having a seriesof longitudinal channels on its outer surface, cutting-blades in saidchannels, each blade having a transverse groove near one end, theconsecutive blades having their grooved ends at opposite ends of thebody-piece, and adjusting-screws extending longitudinally into thebody-piece adjacent to the blades, each screw having a flange engagingthe transverse groove in the adjacent blade.

8. In a milling-cutter, the combination of a body-piece having a seriesof longitudinal channels on its outer surface, cutter-blades in saidchannels, each blade having a plain beveled surface on one side andhaving a transverse groove near one end,.and the consecutive bladeshaving their grooved ends lying at opposite ends of the body,adjusting-screws extending longitudinally into the body adj acent to theblades each screw having a flange engaging the groove in the adjacentblade, and locking-screws having tapering heads adapted to engage thebeveled surfaces. on the blade.

9. A longitudinally-adj ustable milling-cutter blade having a transversegroove or recess near one end and a base projecting for- Wardly from theblade, said base having a continuous beveled face 4 on its forward side,substantially as described.

In testimony whereof I affix my signature 7 in presence of twowitnesses.

, JOHN F. (JADELL.

Witnesses:

ADAM STEIN, E. E. HENDERSON.

